It was an interesting day.
I put my letter of resignation on her desk as soon as I got in. (She arrives 30-45 minutes after me.) She didn't mention it at all the entire day. She did tell the front desk staff and the back office lead, but nothing else.
She may be running scared. The new person that was supposed to start today isn't starting until the 25th. The other MA has already been having talks with her about leaving. The contractor has her last day on the 29th. All things considered, she is looking a tad bit screwed. But, hey, not my problem.